--!The Automatic Cross-platform Build Tool
-- 
-- XMake is free software; you can redistribute it and/or modify
-- it under the terms of the GNU Lesser General Public License as published by
-- the Free Software Foundation; either version 2.1 of the License, or
-- (at your option) any later version.
-- 
-- XMake is distributed in the hope that it will be useful,
-- but WITHOUT ANY WARRANTY; without even the implied warranty of
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-- GNU Lesser General Public License for more details.
-- 
-- You should have received a copy of the GNU Lesser General Public License
-- along with XMake; 
-- If not, see <a href="http://www.gnu.org/licenses/"> http://www.gnu.org/licenses/</a>
-- 
-- Copyright (C) 2009 - 2015, ruki All rights reserved.
--
-- @author      ruki
-- @file        prober.lua
--

-- load modules
local os        = require("base/os")
local path      = require("base/path")
local utils     = require("base/utils")
local string    = require("base/string")
local tools     = require("tools/tools")
local config    = require("base/config")
local global    = require("base/global")

-- define module: prober
local prober = prober or {}

-- probe the architecture
function prober._probe_arch(configs)

    -- get the architecture
    local arch = configs.get("arch")

    -- ok? 
    if arch then return true end

    -- init the default architecture
    configs.set("arch", xmake._ARCH)

    -- trace
    utils.verbose("checking the architecture ... %s", configs.get("arch"))

    -- ok
    return true
end

-- probe the ccache
function prober._probe_ccache(configs)

    -- ok? 
    local ccache_enable = configs.get("ccache")
    if ccache_enable and configs.get("__ccache") then return true end

    -- disable?
    if type(ccache_enable) == "boolean" and not ccache_enable then
        configs.set("__ccache", nil)
        return true
    end

    -- probe the ccache path
    local ccache_path = tools.probe("ccache", {"/usr/bin", "/usr/local/bin", "/opt/bin", "/opt/local/bin"})

    -- probe ok? update it
    if ccache_path then
        configs.set("ccache", true)
        configs.set("__ccache", ccache_path)
    else
        configs.set("ccache", false)
    end

    -- trace
    utils.verbose("checking for the ccache ... %s", utils.ifelse(ccache_path, ccache_path, "no"))

    -- ok
    return true
end

-- probe the project configure 
function prober.config()

    -- call all probe functions
    utils.call(     {   prober._probe_arch
                    ,   prober._probe_ccache}
                ,   nil
                ,   config)
end

-- probe the global configure 
function prober.global()

    -- call all probe functions
    utils.call(     prober._probe_ccache
                ,   nil
                ,   global)
end

-- return module: prober
return prober